Zendesk was attacked. Zendesk offers help desk software support and also provides customer support for companies. Twitter, Tumblr, and Pinterest are the affected companies so far.

Zendesk CEO Mikkel Svanesaid said, the hack occurred this week, as soon as they were knowledgeable of the attacked they patched the vulnerability. He also stated, “Our ongoing investigation indicates that the hacker had access to the support information that three of our customers store on our system.” “We believe that the hacker downloaded email addresses of users who contacted those three customers for support, as well as support email subject lines. We notified our affected customers immediately.”